Parham Alaei
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View article: Optimizing MV CBCT Imaging Protocols Using NTCP and Secondary Cancer Risk: A Multi-Site Study in Breast, Pelvic, and Head & Neck Radiotherapy
Optimizing MV CBCT Imaging Protocols Using NTCP and Secondary Cancer Risk: A Multi-Site Study in Breast, Pelvic, and Head & Neck Radiotherapy Open
Purpose: To evaluate the cumulative radiobiological impact of daily Megavoltage Cone-Beam Computed Tomography (MV-CBCT) imaging dose based on Normal Tissue Complication Probability (NTCP) and Excess Absolute Risk (EAR) of secondary maligna…
View article: On the Necessity of Adopting Irradiation Protocols Recommended by the Compatibility in Irradiation Research Protocols Expert Roundtable (CIRPER) in Published Research and Why It Matters to Health Physicists
On the Necessity of Adopting Irradiation Protocols Recommended by the Compatibility in Irradiation Research Protocols Expert Roundtable (CIRPER) in Published Research and Why It Matters to Health Physicists Open
International audience
View article: The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using Optically Stimulated Luminescent Dosimeters
The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using Optically Stimulated Luminescent Dosimeters Open
Dosimetric analysis is a critical component in radiation therapy delivery. In radiation therapy, bolus materials are frequently used to alter the dose distribution. In this study, we used Optically Stimulated Luminescent Dosimeters (OSLDs)…
View article: The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using OSLD
The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using OSLD Open
Dosimetric analysis is a critical component in radiation therapy delivery. In radiation therapy, bolus materials are frequently used to alter the dose distribution. In this study, we used Optically Stimulated Luminescence Dosimeters (OSLDs…
View article: The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using OSLD
The Dosimetric Analysis of Various Bolus Materials for High-Energy Beams in Radiotherapy Using OSLD Open
Dosimetric analysis is a critical component in radiation therapy delivery. In radiation therapy, bolus materials are frequently used to alter the dose distribution. In this study, we used Optically Stimulated Luminescence Dosimeters (OSLDs…
View article: Imaging dose and image quality of kilovoltage imaging implemented on a helical tomotherapy unit
Imaging dose and image quality of kilovoltage imaging implemented on a helical tomotherapy unit Open
The purpose of this work was to evaluate the imaging dose for the Accuray Radixact ClearRT system. Low-contrast resolution and CT number consistency was evaluated as well. CTDI measurements were compared to vendor supplied values, and simi…
View article: Clinical Characterization of BeO OSLDs: High Dose Response and Extended Energy Dependence
Clinical Characterization of BeO OSLDs: High Dose Response and Extended Energy Dependence Open
View article: Recommendations for harmonized reporting of radiation Dosimetry by adoption of Compatibility in Irradiation Research Protocols Expert Roundtable (CIRPER)
Recommendations for harmonized reporting of radiation Dosimetry by adoption of Compatibility in Irradiation Research Protocols Expert Roundtable (CIRPER) Open
Here, in radiobiology, radiation physics, and related areas, there is growing interest in transitioning from cesium-based irradiators to X-ray technologies. Therefore, it makes it imperative for reproducibility purposes, for researchers to…
View article: A Patient-Specific correspondence model to track tumor location in thorax during radiation therapy
A Patient-Specific correspondence model to track tumor location in thorax during radiation therapy Open
View article: Comparison of visual and semi‐automated kilovoltage cone beam CT image QA analysis
Comparison of visual and semi‐automated kilovoltage cone beam CT image QA analysis Open
Established kilovoltage cone‐beam computed tomography (kV‐CBCT) image quality assurance (QA) guidelines often rely on recommendations provided by the American Association of Physicists in Medicine (AAPM) task group (TG) reports with metric…
View article: A novel analytical method for computing dose from kilovoltage beams used in Image-Guided radiation therapy
A novel analytical method for computing dose from kilovoltage beams used in Image-Guided radiation therapy Open
View article: A Patient-Specific Correspondence Model to Track Tumor Location in Thorax During Radiation Therapy
A Patient-Specific Correspondence Model to Track Tumor Location in Thorax During Radiation Therapy Open
View article: First Multimodal, Three-Dimensional, Image-Guided Total Marrow Irradiation Model for Preclinical Bone Marrow Transplantation Studies
First Multimodal, Three-Dimensional, Image-Guided Total Marrow Irradiation Model for Preclinical Bone Marrow Transplantation Studies Open
View article: How low can you go? A CBCT dose reduction study
How low can you go? A CBCT dose reduction study Open
Purpose Cone beam computed tomography (CBCT) is often used for patient setup based solely on bony anatomy. The goal of this work was to evaluate whether CBCT dose can be lowered to the level of kV image pair doses when used for bony anatom…
View article: Practice patterns and recommendations for pediatric image‐guided radiotherapy: A Children's Oncology Group report
Practice patterns and recommendations for pediatric image‐guided radiotherapy: A Children's Oncology Group report Open
This report by the Radiation Oncology Discipline of Children's Oncology Group (COG) describes the practice patterns of pediatric image‐guided radiotherapy (IGRT) based on a member survey and provides practice recommendations accordingly. T…
View article: RTHP-32. FIRST EXPERIENCE WITH GAMMATILE PERMANENT IMPLANTS FOR RECURRENT BRAIN TUMORS
RTHP-32. FIRST EXPERIENCE WITH GAMMATILE PERMANENT IMPLANTS FOR RECURRENT BRAIN TUMORS Open
GammatileTM permanent brachytherapy implants have been FDA cleared for patients with recurrent brain tumors. We report our experience with the first 6 patients with recurrent high grade primary brain tumors treated with re-resection and im…
View article: Multi-institutional evaluation of MVCT guided patient registration and dosimetric precision in total marrow irradiation: A global health initiative by the international consortium of total marrow irradiation
Multi-institutional evaluation of MVCT guided patient registration and dosimetric precision in total marrow irradiation: A global health initiative by the international consortium of total marrow irradiation Open
View article: Impact of region of interest size and location in Gafchromic film dosimetry
Impact of region of interest size and location in Gafchromic film dosimetry Open
Introduction:
Accurate film dosimetry requires careful consideration of sources of uncertainty. Some of the sources of uncertainty are dependent on the size and location of region of interest (ROI), especially in small fields. Avoiding th…
View article: Two-dimensional dose reconstruction using scatter correction of portal images
Two-dimensional dose reconstruction using scatter correction of portal images Open
An accurate empirical algorithm for 2D patient dose reconstruction has been developed. The algorithm was applied to phantom and patient data sets and is able to calculate dose in the midplane. Results indicate that the EPID dose reconstruc…
View article: Image guidance doses delivered during radiotherapy: Quantification, management, and reduction: Report of the <scp>AAPM</scp> Therapy Physics Committee Task Group 180
Image guidance doses delivered during radiotherapy: Quantification, management, and reduction: Report of the <span>AAPM</span> Therapy Physics Committee Task Group 180 Open
Background With radiotherapy having entered the era of image guidance, or image‐guided radiation therapy ( IGRT ), imaging procedures are routinely performed for patient positioning and target localization. The imaging dose delivered may r…
View article: Imaging Dose in Radiation Therapy
Imaging Dose in Radiation Therapy Open
This chapter presents a variety of measurement and reviews calculation techniques for characterizing the radiation dose from x-ray imaging systems used in radiation therapy (RT). The electronic portal imaging device is probably the most ba…
View article: Early assessment of dosimetric and biological differences of total marrow irradiation versus total body irradiation in rodents
Early assessment of dosimetric and biological differences of total marrow irradiation versus total body irradiation in rodents Open
View article: Evaluation of dose calculation accuracy of treatment planning systems at hip prosthesis interfaces
Evaluation of dose calculation accuracy of treatment planning systems at hip prosthesis interfaces Open
There are an increasing number of radiation therapy patients with hip prosthesis. The common method of minimizing treatment planning inaccuracies is to avoid radiation beams to transit through the prosthesis. However, the beams often exit …
View article: Implementation of full/half bowtie filter models in a commercial treatment planning system for kilovoltage cone‐beam CT dose estimations
Implementation of full/half bowtie filter models in a commercial treatment planning system for kilovoltage cone‐beam CT dose estimations Open
The purpose of this study was to implement full/half bowtie filter models in a commercial treatment planning system (TPS) to calculate kilovoltage (kV) cone‐beam CT (CBCT) doses of Varian On‐Board Imager (OBI) kV X‐ray imaging system. The …
View article: Imaging dose from cone beam computed tomography in radiation therapy
Imaging dose from cone beam computed tomography in radiation therapy Open
View article: EP-1402: n empirical model for portal dose prediction by a CCD camera-based EPID
EP-1402: n empirical model for portal dose prediction by a CCD camera-based EPID Open
View article: Characterization of an orthovoltage biological irradiator used for radiobiological research
Characterization of an orthovoltage biological irradiator used for radiobiological research Open
Orthovoltage irradiators are routinely used to irradiate specimens and small animals in biological research. There are several reports on the characteristics of these units for small field irradiations. However, there is limited knowledge …
View article: Dose response characteristics of a novel CCD camera-based electronic portal imaging device comparison with OCTAVIUS detector
Dose response characteristics of a novel CCD camera-based electronic portal imaging device comparison with OCTAVIUS detector Open
These results indicate that the EPID is well suited for accurate dosimetric purposes, the major limitation currently being due to integration time and dead-time in frame acquisition.